EFFECT OF NITROGEN FORMS AND LEVELS ON YIELD AND SOME GROWTH CHARACTERS OF BARLEY GENOTYPES UNDER SALINE CONDITIONS | ||
| Journal of Plant Production | ||
| Article 6, Volume 27, Issue 6, June 2002, Pages 3683-3696 PDF (4.53 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2002.254803 | ||
| Authors | ||
| I. A. Ahmed,; Kh. A. Moustafa; K. Amer | ||
| Barley Research Department, Field Crops Research Institute, ARC, Giza, Egypt | ||
| Abstract | ||
| Two field experiments were conducted at EI-Hamoul site, Kafr EL-Sheikh Governorate during two successive seasons (1999/2000 and 2000/2001, where soil salinity is the main environmental problem. The experimental materials consisted of fourty-eight barley genotypes, three forms of nitrogen fertilization (Ammonium sulphate, ammonium nitrate and urea) and two levels of nitrogen fertilization (70 and 105 kg N/ha).The objectives of this study were to investigate the interaction effects of salinity and both forms and levels of nitrogen fertilization on yield of some barley promising genotypes. Also, to select the best genotypes under saline condition, which characterized by its low requirements of nitrogen fertilization under saline conditions. The obtained results from the first season proved that applying ammonium nitrate exceeded significantly both ammonium sulphate and urea in case of biological and grain yield. The highest level of nitrogen' fertilizer produced the highest values of plant height, biological and grain yields. Out of the fourty-eight genotypes tested under saline conditions, nine genotypes were selected according to their performances under saline condition. The selected nine genotypes produced higher biological and grain yields than the rest of genotypes. Those selec ten entries were reevaluated under same condition in the second growing season 2000/2001 with three national checks; Giza 123, Giza 126 and Giza 2000. Obtained results from the second season confied the results of the first one and proved that ammonium nitrate as nitrogen form is recommended for saline soils. Genotypes evaluation under saline conditions and fertilized with the lowest level of nitrogen fertilization revealed that four genotypes exceeded significantly the national check Giza 123 in grain yield under the low level of nitrogen fertilization. Also, the study of genotypic stability proved that two genotypes seemed to be the most stable genotypes. Those genotypes are of great importance for breeding to low requirements of nitrogen fertilization under saline conditions and should be used in the national breeding program. | ||
| Keywords | ||
| Barley; soil salinity; nitrogen forms and levels; yield parameters; biological and grain yield stability | ||
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